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Zip và UnZip Online

Zip và UnZip Online directly in your browser with fflate. Create ZIP archives, extract ZIP files, add files or folders, choose compression level, inspect contents, and download results without uploading private files.

Practical guide

Zip và UnZip Online is built for compressing files into a ZIP archive or extracting a ZIP file without sending private data to a server. The workflow runs in the browser with fflate, so it fits quick file sharing, code handoff, support bundles, classroom submissions, and content operations where privacy matters.

Where this fits

Bundle project files before sharing

Add individual files or a folder, keep the relative paths, choose a compression level, and download one portable ZIP. This is useful for source snippets, CSV exports, design handoff files, and small support packages.

Inspect a ZIP before opening every file

Upload a ZIP archive, review the file list and sizes, then download only the entries you actually need. It is a safer workflow than blindly extracting unknown archives into your downloads folder.

How to use Zip và UnZip Online

  1. 1Choose Zip or Unzip modeUse Zip files when you want to create a new archive. Use Unzip archive when you need to inspect and extract an existing .zip file.
  2. 2Add files, a folder, or a ZIP archiveDrag files onto the tool or use the file buttons. Folder uploads keep browser-provided relative paths when available.
  3. 3Review paths and compression settingsFor new archives, confirm file names and choose store-only, balanced, or maximum compression based on the file types.
  4. 4Download the resultDownload the created ZIP, a single extracted file, or a fresh ZIP containing all extracted entries.

Practical notes

Pick the right compression level

Balanced compression is a good default for mixed folders. Maximum compression helps most with text, code, CSV, HTML, XML, and JSON. Store-only is better for JPG, MP4, PDF, and other already compressed files.

Keep archive names predictable

Use a short output name that describes the project, date, or recipient. Predictable ZIP names reduce mistakes when sending files to clients, teachers, or support teams.

Understand browser memory limits

Because processing is local, very large archives depend on available browser memory. For multi-gigabyte backups, a desktop archive manager is still the right tool.

Private archive workflow

Create or inspect the ZIP locally, then continue with the specific file tool that matches the extracted content.

  1. 1

    Create or extract the ZIP here

  2. 2

    JSON Formatter

  3. 3

    Image Converter

  4. 4

    Base64 Encoder / Decoder

Questions worth checking

Does Appkiro upload my files when zipping or unzipping?

No. Files are read and processed in the browser tab with fflate. The server does not receive the original files or the generated ZIP.

Can this tool unzip password-protected archives?

No. Encrypted or password-protected ZIP files are not supported in this browser workflow.

Why does my ZIP not become much smaller?

Images, videos, PDFs, and many office files are already compressed. ZIP compression helps most with text-based and uncompressed formats.

Are folder paths preserved?

Yes, when the browser provides relative paths through folder selection. Unsafe absolute paths and parent-directory segments are filtered before download links are created.

What file size is recommended?

Small and medium archives work best. The practical limit depends on your device memory because the compression and extraction run locally.

Related tools

JSON FormatterBeautify, minify, and validate JSON in your browser with indent, key sorting, non-ASCII escape, and clear line/column error reporting — no upload required.
Base64 Encoder / DecoderEncode and decode Base64 strings, with standard and URL-safe variants plus output information.
Image ConverterConvert images between PNG, JPEG, WebP, AVIF, GIF, BMP, TIFF, ICO, and ICNS with browser-based processing.
PDF to ImageConvert PDF pages to JPG, PNG, or WebP images. Pick page range, resolution, color mode, and background, then download a single image or a ZIP archive.